When Networking Doesn’t Work
ATT&CK techniques detected
T1008Fallback Channels
92%
“when networking doesn ’ t work when networking doesn ’ t work os2museum. com / wp / when - networking - doesnt - work / a windows 11 machine could send ipmi traffic to an old tyan smdc card but never receive usable replies. the issue turned out to be a windows - side checksum off…”
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Summary
A Windows 11 machine could send IPMI traffic to an old Tyan SMDC card but never receive usable replies. The issue turned out to be a Windows-side checksum offload problem in Intel NIC drivers; disabling IPv4 UDP receive checksum offloading fixed communication on affected systems. [os2museum.com]